build: define CC/GAWK if undefined

Just in case the value is not defined in config.mk and `make` is first
executed from another directory (such as in src/man) instead of the root
directory.

This amends commit 93d623fdf ("build: allow overriding certain tools",
2024-02-23) / PR #6222.

5 files changed, 10 insertions, 0 deletions

diff --git a/src/bash_completion/Makefile b/src/bash_completion/Makefile
index c7ef6afc6..91a1be0bc 100644
--- a/src/bash_completion/Makefile
+++ b/src/bash_completion/Makefile
@@ -2,6 +2,8 @@
 ROOT = ../..
 -include $(ROOT)/config.mk
 
+GAWK ?= gawk
+
 .PHONY: all
 all: firejail.bash_completion
 
diff --git a/src/man/Makefile b/src/man/Makefile
index 1c1fd49a5..682aadaad 100644
--- a/src/man/Makefile
+++ b/src/man/Makefile
@@ -2,6 +2,8 @@
 ROOT = ../..
 -include $(ROOT)/config.mk
 
+GAWK ?= gawk
+
 MOD_DIR := $(ROOT)/src/man
 MANPAGES_IN := $(sort $(wildcard $(MOD_DIR)/*.in))
 MANPAGES_GZ := $(MANPAGES_IN:.in=.gz)
diff --git a/src/prog.mk b/src/prog.mk
index a639e87fc..4f9309d8c 100644
--- a/src/prog.mk
+++ b/src/prog.mk
@@ -5,6 +5,8 @@
 # The includer should probably define PROG and TARGET and may also want to
 # define EXTRA_OBJS and extend CLEANFILES.
 
+CC ?= cc
+
 HDRS :=
 SRCS := $(sort $(wildcard $(MOD_DIR)/*.c))
 OBJS := $(SRCS:.c=.o)
diff --git a/src/so.mk b/src/so.mk
index ac76ffc30..cb1f08b08 100644
--- a/src/so.mk
+++ b/src/so.mk
@@ -5,6 +5,8 @@
 # The includer should probably define SO and TARGET and may also want to define
 # EXTRA_OBJS and extend CLEANFILES.
 
+CC ?= cc
+
 HDRS :=
 SRCS := $(sort $(wildcard $(MOD_DIR)/*.c))
 OBJS := $(SRCS:.c=.o)
diff --git a/src/zsh_completion/Makefile b/src/zsh_completion/Makefile
index e964d39ec..80c8b1608 100644
--- a/src/zsh_completion/Makefile
+++ b/src/zsh_completion/Makefile
@@ -2,6 +2,8 @@
 ROOT = ../..
 -include $(ROOT)/config.mk
 
+GAWK ?= gawk
+
 .PHONY: all
 all: _firejail